$4$B$.$ A stack emits $10\frac{g}{s}$ of SO$2$ at a stack height of $40m.$ The plume rises vertically $10m$ before being transported horizontally. The wind speed at $10m$ is

$4\frac{m}{s}$ under a cloudy night. What is the ground level concentration $500m$ directly downwind? Note: to use the formulas, $x$ must be given in km to get $$ in

meters.

Select the best answer.

$u_H=5\mathrm{.}98\frac{m}{s}$

${}_y=36\mathrm{.}6m^2$

${}_z=18\mathrm{.}4m^2$

$=19\mathrm{.}7\frac{g}{m^3}$

$u_H=5\mathrm{.}98\frac{m}{s}$

${}_y=36\mathrm{.}6m$

${}_z=18\mathrm{.}4m$

$C=19\mathrm{.}7\frac{g}{m^3}$

$u_H=5\mathrm{.}98\frac{m}{s}$

${}_y=36\mathrm{.}6m$

${}_z=18\mathrm{.}4m$

$=19\mathrm{.}7\frac{g}{m^3}$